<s>
Puddletag	B-Language
is	O
a	O
graphical	O
audio	O
file	O
metadata	B-Application
editor	I-Application
(	O
"	O
tagger	O
"	O
)	O
for	O
Unix-like	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
.	O
</s>
<s>
It	O
is	O
free	B-License
and	I-License
open-source	I-License
software	I-License
subject	O
to	O
the	O
terms	O
of	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPL	B-License
)	O
version	O
3	O
.	O
</s>
<s>
The	O
user	O
interface	O
is	O
modeled	O
after	O
the	O
popular	O
Windows	O
freeware	O
Mp3tag	B-Language
.	O
</s>
<s>
In	O
July	O
2008	O
,	O
the	O
first	O
version	O
(	O
0.1	O
)	O
was	O
released	O
via	O
SourceForge	B-Application
.	O
</s>
<s>
Puddletag	B-Language
is	O
written	O
in	O
Python	B-Language
and	O
uses	O
Qt	B-Language
5	O
(	O
through	O
PyQt	B-Language
)	O
for	O
its	O
graphical	O
user	O
interface	O
.	O
</s>
<s>
As	O
backend	O
it	O
utilizes	O
,	O
a	O
Python	B-Language
module	O
to	O
handle	O
audio	O
metadata	O
.	O
</s>
<s>
Mutagen	O
supports	O
ASF	B-Application
,	O
FLAC	B-Application
,	O
M4A	O
,	O
APE	B-Language
,	O
MP3	B-Application
,	O
MPC	B-Algorithm
,	O
Ogg	B-Algorithm
Opus	I-Algorithm
,	O
Ogg	B-Application
FLAC	I-Application
,	O
Ogg	B-Application
Speex	I-Application
,	O
Ogg	O
Theora	O
,	O
Ogg	B-Algorithm
Vorbis	I-Algorithm
,	O
True	O
Audio	O
,	O
WavPack	B-Application
,	O
OptimFROG	O
,	O
and	O
AIFF	O
audio	O
files	O
.	O
</s>
<s>
It	O
can	O
read	O
Xing	O
headers	O
to	O
accurately	O
calculate	O
the	O
bitrate	O
and	O
length	O
of	O
MP3s	B-Application
.	O
</s>
<s>
Puddletag	B-Language
includes	O
support	O
for	O
the	O
following	O
audio	O
formats	O
:	O
AAC	B-Application
,	O
MP4	O
(	O
mp4/m4a/m4b/iTunes	O
compatible	O
)	O
,	O
OGG	O
,	O
OptimFROG	O
OFR	O
,	O
OFS	O
,	O
SPX	B-Application
,	O
TAK	O
,	O
TTA	B-Algorithm
,	O
WMA	B-Application
,	O
WV	B-Application
.	O
</s>
<s>
Write	O
ID3v1.1	O
,	O
ID3v2.3	O
,	O
ID3v2.4	O
,	O
MPEG-4	B-Algorithm
,	O
WMA	B-Application
,	O
APEv2	O
Tags	O
and	O
Vorbis	B-Algorithm
comments	O
to	O
multiple	O
files	O
at	O
once	O
.	O
</s>
